4应用上述分析的意义主要有以下两方面：第一，先验方差信息、有助于根据有限的钻孔数据或地下拣块试样数据进行平均品位的计算；第二，方差模式和空间结构的先验认识有利于借助外围资料用宏观克立格法进行这样的估算。41均值估算的改进尽管算术平均法是一种基本的传统估算法， 4 The significance of applying the above analysis mainly lies in the following two aspects. First, the prior variance information helps to calculate the average grade based on the limited drilling data or the sample data of underground picking blocks. Second, the variance model and the spatial structure The a priori knowledge is conducive to the use of external data using macro kriging for such estimates. 41 Improvement of Mean Estimation Although arithmetic mean is a basic traditional estimation method,